The so-called anodization of aluminum is an electrolytic oxidation process, in which the surface of aluminum and aluminum alloys is usually transformed into an oxide film, which has protective, decorative and some other functional properties. The anodization of aluminum from this definition only includes the part of the process of forming an anodized film. Anodic oxidation, the electrochemical oxidation of metals or alloys.
Under the corresponding electrolyte and specific process conditions, aluminum and its alloys form an oxide film on the aluminum product (anode) due to the action of the applied current. Anodizing usually refers to sulfuric acid anodizing unless otherwise specified. In order to overcome the defects of surface hardness and wear resistance of aluminum alloys, expand the scope of application and prolong the service life, surface treatment technology has become an indispensable part of the use of aluminum alloys, and anodizing technology is currently the most widely used and most successful. of.